Which equation could be used to solve the given problem: If three times a number is increased by 24, the result is 4 less than seven times the number.

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Aubrey read 29 books and eli read 52 books what number is equal to the number of books aubrey read?

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters